How do you sort in COBOL program?
Syntax. SORT work-file ON ASCENDING KEY rec-key1 [ON DESCENDING KEY rec-key2] USING input-file GIVING output-file. Opens work-file in I-O mode, input-file in the INPUT mode and output-file in the OUTPUT mode. Transfers the records present in the input-file to the work-file.
How can we sort in COBOL and declaration?
The SORT statement creates a sort file by executing input procedures or by transferring records from another file, sorts the records in the sort file on a set of specified keys, and in the final phase of the sort operation, makes available each record from the sort file, in sorted order to some output procedures or to …
What is input procedure and output procedure in COBOL?
The INPUT PROCEDURE is responsible for supplying all of the input records to be sorted to DFSORT, while the OUTPUT PROCEDURE is responsible for disposing of all the records after they are sorted.
How do you sort in a COBOL program give sort file definition sort statement syntax and meaning?
Note: For file-name-1, SD entry should be defined in FILE SECTION as given below. Please click here to refer to the Full COBOL SORT syntax. file-name-1/input-file/output-file – Specifies the file name in the SD entry. All three files are opened by the SORT statement itself and close on sort completion.
What is FD and SD in COBOL?
In a COBOL program, the File Description (FD) Entry (or Sort Description (SD) Entry for sort/merge files) represents the highest level of organization in the File Section. The File Description (FD) Entry (or Sort Description (SD) Entry) has six formats: Format 1 – Sequential File. Format 2 – Diskette File.
How do you sort PS in COBOL?
Following is the syntax to sort a file: SORT work-file ON ASCENDING KEY rec-key1 [ON DESCENDING KEY rec-key2] USING input-file GIVING output-file. SORT performs the following operations: Opens work-file in the I-O mode, input-file in the INPUT mode and output-file in the OUTPUT mode.
How do you record a reverse order in COBOL?
procedure division. begin. open input file1 reversed output file2 perform read-file1 perform until eof-file1 write file2-rec from file1-rec perform read-file1 end-perform close file1 file2 stop run . read-file1.
What is input-output section in COBOL?
The I-O-CONTROL paragraph of the input-output section specifies when checkpoints are to be taken and the storage areas to be shared by different files. This paragraph is optional in a COBOL program. RERUN clause. The RERUN clause specifies that checkpoint records are to be taken.
How do you sort records in mainframe?
‘A’ means Ascending order. We can also sort the record by descending using ‘D’. Example 2: SORT a record in input file by two field….Syntax:
| Name | Description |
|---|---|
| Length | Length of the field to be compared |
| data format | Format of the field like CH, PD, BI, ZD etc,. |
| A/D | Specifies the sorting order, A- Ascending, B- Descending |
How do you sort records in JCL?
JCL – Basic Sort Tricks
- A file has 100 records. The first 10 records need to be written to output file.
- Input file has one or more records for same employee number. Write unique records to output.
- Overwrite input record content.
How do you sort in descending order in JCL?
There are many character format is available, We mostly use below formats. ‘A’ means Ascending order. We can also sort the record by descending using ‘D’. Example 2: SORT a record in input file by two field.
How do you open input-output mode in COBOL?
Extend mode is used to append records in a sequential file. In this mode, records are inserted at the end. If file access mode is Random or Dynamic, then extend mode cannot be used. Input-Output mode is used to read and rewrite the records of a file.
How does sort work in mainframe?
The Sort/Merge utility is a mainframe program to sort records in a file into a specified order, merge pre-sorted files into a sorted file, or copy selected records. Internally, these utilities use one or more of the standard sorting algorithms, often with proprietary fine-tuned code.